[sdiy] +-12V from two +12V

Andrew Simper andy at cytomic.com
Tue Jul 17 16:34:27 CEST 2012


Hi Marin,

Thanks for the info! They do look identical. I'll try and find a dual
variable voltage and current unit so I can get +-15. and get ungraded
current limiting. I'm make sure to double check how much current it's
generating with a DMM before breadboarding anything.

All the best,

Andy
--
cytomic - sound music software


On 17 July 2012 20:29, Martin Klang <mars at pingdynasty.com> wrote:
>
> oh and you should know that constant current doesn't really work, not as described by the distributors.
> As it says in the user manual:
> "Overload and Short Circuit Protection: Prevent the unit from overload and short circuit.
> When the unit is under the condition of overload or short circuit, the output current will
> be limited."
> The current dial simply sets the overload limit, on an ungraded scale.
>
> best,
>
> /m
>
>
> On 17 Jul 2012, at 12:59, Andrew Simper wrote:
>
>> Before I blow anything up can I please ask someone to help out and
>> double check something?
>>
>> I want to buy this power supply:
>> http://www.manson.com.hk/en/dcpowersupplies_detail.php?m=3&id=5
>>
>> Dial in 0.5 A and +12 V for the variable output and it already has a
>> fixed output of the same ratings. I want to generate +12 V and -12 V,
>> is it just a matter of connecting the +12 V of the second supply to
>> the 0V of the first supply so that pushed the second one's 0V is
>> pushed to -12? Also is +- 12 V enough to run most audio circuits even
>> if they are +-15 V on the schematic?
>>
>> Thanks,
>>
>> Andy
>> --
>> cytomic - sound music software
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>



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